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<title>FatFs - f_puts</title>
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<div class="para func">
<h2>f_puts</h2>
<p>The f_puts function writes a string to the file.</p>
<pre>
int f_puts (
  const TCHAR* <span class="arg">str</span>, <span class="c">/* [IN] String */</span>
  FIL* <span class="arg">fp</span>           <span class="c">/* [IN] File object */</span>
);
</pre>
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<div class="para arg">
<h4>Parameters</h4>
<dl class="par">
<dt>str</dt>
<dd>Pointer to the null terminated string to be written. The terminator character will not be written.</dd>
<dt>fp</dt>
<dd>Pointer to the open file object structure.</dd>
</dl>
</div>


<div class="para ret">
<h4>Return Value</h4>
<p>When the string was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, a negative value will be returned.</p>
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<div class="para desc">
<h4>Description</h4>
<p>When FatFs is configured for Unicode API (<tt><a href="config.html#lfn_unicode">FF_LFN_UNICODE</a> &gt;= 1</tt>), character encoding on the string fuctions, <tt>f_putc</tt>, <tt>f_puts</tt>, <tt>f_printf</tt> and <tt>f_gets</tt> function, is also switched to Unicode. The input Unicode characters in multiple encoding unit, such as surrogate pair and multi-byte sequence, should not be divided into two function calls, or the character will be lost. The character encoding <em>on the file</em> to be written via this functions is selected by <tt><a href="config.html#strf_encode">FF_STRF_ENCODE</a></tt>. The characters with wrong encoding or invalid for the output encoding will be lost.</p>
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<div class="para comp">
<h4>QuickInfo</h4>
<p>This is a wrapper function of <a href="write.html"><tt>f_write</tt></a> function. Available when <tt><a href="config.html#fs_readonly">FF_FS_READONLY</a> == 0</tt> and <tt><a href="config.html#use_strfunc">FF_USE_STRFUNC</a> &gt;= 1</tt>. When <tt>FF_USE_STRFUNC == 2</tt>, <tt>'\n'</tt>s contained in the input string are output as <tt>'\r'+'\n'</tt> each.</p>
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<div class="para ref">
<h4>See Also</h4>
<p><tt><a href="open.html">f_open</a>, <a href="putc.html">f_putc</a>, <a href="printf.html">f_printf</a>, <a href="gets.html">f_gets</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a></tt></p>
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